1 #ifndef _LINUX__INIT_TASK_H 2 #define _LINUX__INIT_TASK_H 3 4 #include <linux/rcupdate.h> 5 #include <linux/irqflags.h> 6 #include <linux/utsname.h> 7 #include <linux/lockdep.h> 8 #include <linux/ftrace.h> 9 #include <linux/ipc.h> 10 #include <linux/pid_namespace.h> 11 #include <linux/user_namespace.h> 12 #include <linux/securebits.h> 13 #include <linux/seqlock.h> 14 #include <linux/rbtree.h> 15 #include <net/net_namespace.h> 16 #include <linux/sched/rt.h> 17 18 #ifdef CONFIG_SMP 19 # define INIT_PUSHABLE_TASKS(tsk) \ 20 .pushable_tasks = PLIST_NODE_INIT(tsk.pushable_tasks, MAX_PRIO), 21 #else 22 # define INIT_PUSHABLE_TASKS(tsk) 23 #endif 24 25 extern struct files_struct init_files; 26 extern struct fs_struct init_fs; 27 28 #ifdef CONFIG_CPUSETS 29 #define INIT_CPUSET_SEQ(tsk) \ 30 .mems_allowed_seq = SEQCNT_ZERO(tsk.mems_allowed_seq), 31 #else 32 #define INIT_CPUSET_SEQ(tsk) 33 #endif 34 35 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE 36 #define INIT_PREV_CPUTIME(x) .prev_cputime = { \ 37 .lock = __RAW_SPIN_LOCK_UNLOCKED(x.prev_cputime.lock), \ 38 }, 39 #else 40 #define INIT_PREV_CPUTIME(x) 41 #endif 42 43 #define INIT_SIGNALS(sig) { \ 44 .nr_threads = 1, \ 45 .thread_head = LIST_HEAD_INIT(init_task.thread_node), \ 46 .wait_chldexit = __WAIT_QUEUE_HEAD_INITIALIZER(sig.wait_chldexit),\ 47 .shared_pending = { \ 48 .list = LIST_HEAD_INIT(sig.shared_pending.list), \ 49 .signal = {{0}}}, \ 50 .posix_timers = LIST_HEAD_INIT(sig.posix_timers), \ 51 .cpu_timers = INIT_CPU_TIMERS(sig.cpu_timers), \ 52 .rlim = INIT_RLIMITS, \ 53 .cputimer = { \ 54 .cputime_atomic = INIT_CPUTIME_ATOMIC, \ 55 .running = false, \ 56 .checking_timer = false, \ 57 }, \ 58 INIT_PREV_CPUTIME(sig) \ 59 .cred_guard_mutex = \ 60 __MUTEX_INITIALIZER(sig.cred_guard_mutex), \ 61 } 62 63 extern struct nsproxy init_nsproxy; 64 65 #define INIT_SIGHAND(sighand) { \ 66 .count = ATOMIC_INIT(1), \ 67 .action = { { { .sa_handler = SIG_DFL, } }, }, \ 68 .siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \ 69 .signalfd_wqh = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh), \ 70 } 71 72 extern struct group_info init_groups; 73 74 #define INIT_STRUCT_PID { \ 75 .count = ATOMIC_INIT(1), \ 76 .tasks = { \ 77 { .first = NULL }, \ 78 { .first = NULL }, \ 79 { .first = NULL }, \ 80 }, \ 81 .level = 0, \ 82 .numbers = { { \ 83 .nr = 0, \ 84 .ns = &init_pid_ns, \ 85 .pid_chain = { .next = NULL, .pprev = NULL }, \ 86 }, } \ 87 } 88 89 #define INIT_PID_LINK(type) \ 90 { \ 91 .node = { \ 92 .next = NULL, \ 93 .pprev = NULL, \ 94 }, \ 95 .pid = &init_struct_pid, \ 96 } 97 98 #ifdef CONFIG_AUDITSYSCALL 99 #define INIT_IDS \ 100 .loginuid = INVALID_UID, \ 101 .sessionid = (unsigned int)-1, 102 #else 103 #define INIT_IDS 104 #endif 105 106 #ifdef CONFIG_PREEMPT_RCU 107 #define INIT_TASK_RCU_TREE_PREEMPT() \ 108 .rcu_blocked_node = NULL, 109 #else 110 #define INIT_TASK_RCU_TREE_PREEMPT(tsk) 111 #endif 112 #ifdef CONFIG_PREEMPT_RCU 113 #define INIT_TASK_RCU_PREEMPT(tsk) \ 114 .rcu_read_lock_nesting = 0, \ 115 .rcu_read_unlock_special.s = 0, \ 116 .rcu_node_entry = LIST_HEAD_INIT(tsk.rcu_node_entry), \ 117 INIT_TASK_RCU_TREE_PREEMPT() 118 #else 119 #define INIT_TASK_RCU_PREEMPT(tsk) 120 #endif 121 #ifdef CONFIG_TASKS_RCU 122 #define INIT_TASK_RCU_TASKS(tsk) \ 123 .rcu_tasks_holdout = false, \ 124 .rcu_tasks_holdout_list = \ 125 LIST_HEAD_INIT(tsk.rcu_tasks_holdout_list), \ 126 .rcu_tasks_idle_cpu = -1, 127 #else 128 #define INIT_TASK_RCU_TASKS(tsk) 129 #endif 130 131 extern struct cred init_cred; 132 133 extern struct task_group root_task_group; 134 135 #ifdef CONFIG_CGROUP_SCHED 136 # define INIT_CGROUP_SCHED(tsk) \ 137 .sched_task_group = &root_task_group, 138 #else 139 # define INIT_CGROUP_SCHED(tsk) 140 #endif 141 142 #ifdef CONFIG_PERF_EVENTS 143 # define INIT_PERF_EVENTS(tsk) \ 144 .perf_event_mutex = \ 145 __MUTEX_INITIALIZER(tsk.perf_event_mutex), \ 146 .perf_event_list = LIST_HEAD_INIT(tsk.perf_event_list), 147 #else 148 # define INIT_PERF_EVENTS(tsk) 149 #endif 150 151 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN 152 # define INIT_VTIME(tsk) \ 153 .vtime_seqcount = SEQCNT_ZERO(tsk.vtime_seqcount), \ 154 .vtime_snap = 0, \ 155 .vtime_snap_whence = VTIME_SYS, 156 #else 157 # define INIT_VTIME(tsk) 158 #endif 159 160 #define INIT_TASK_COMM "swapper" 161 162 #ifdef CONFIG_RT_MUTEXES 163 # define INIT_RT_MUTEXES(tsk) \ 164 .pi_waiters = RB_ROOT, \ 165 .pi_waiters_leftmost = NULL, 166 #else 167 # define INIT_RT_MUTEXES(tsk) 168 #endif 169 170 #ifdef CONFIG_NUMA_BALANCING 171 # define INIT_NUMA_BALANCING(tsk) \ 172 .numa_preferred_nid = -1, \ 173 .numa_group = NULL, \ 174 .numa_faults = NULL, 175 #else 176 # define INIT_NUMA_BALANCING(tsk) 177 #endif 178 179 #ifdef CONFIG_KASAN 180 # define INIT_KASAN(tsk) \ 181 .kasan_depth = 1, 182 #else 183 # define INIT_KASAN(tsk) 184 #endif 185 186 /* 187 * INIT_TASK is used to set up the first task table, touch at 188 * your own risk!. Base=0, limit=0x1fffff (=2MB) 189 */ 190 #define INIT_TASK(tsk) \ 191 { \ 192 .state = 0, \ 193 .stack = init_stack, \ 194 .usage = ATOMIC_INIT(2), \ 195 .flags = PF_KTHREAD, \ 196 .prio = MAX_PRIO-20, \ 197 .static_prio = MAX_PRIO-20, \ 198 .normal_prio = MAX_PRIO-20, \ 199 .policy = SCHED_NORMAL, \ 200 .cpus_allowed = CPU_MASK_ALL, \ 201 .nr_cpus_allowed= NR_CPUS, \ 202 .mm = NULL, \ 203 .active_mm = &init_mm, \ 204 .restart_block = { \ 205 .fn = do_no_restart_syscall, \ 206 }, \ 207 .se = { \ 208 .group_node = LIST_HEAD_INIT(tsk.se.group_node), \ 209 }, \ 210 .rt = { \ 211 .run_list = LIST_HEAD_INIT(tsk.rt.run_list), \ 212 .time_slice = RR_TIMESLICE, \ 213 }, \ 214 .tasks = LIST_HEAD_INIT(tsk.tasks), \ 215 INIT_PUSHABLE_TASKS(tsk) \ 216 INIT_CGROUP_SCHED(tsk) \ 217 .ptraced = LIST_HEAD_INIT(tsk.ptraced), \ 218 .ptrace_entry = LIST_HEAD_INIT(tsk.ptrace_entry), \ 219 .real_parent = &tsk, \ 220 .parent = &tsk, \ 221 .children = LIST_HEAD_INIT(tsk.children), \ 222 .sibling = LIST_HEAD_INIT(tsk.sibling), \ 223 .group_leader = &tsk, \ 224 RCU_POINTER_INITIALIZER(real_cred, &init_cred), \ 225 RCU_POINTER_INITIALIZER(cred, &init_cred), \ 226 .comm = INIT_TASK_COMM, \ 227 .thread = INIT_THREAD, \ 228 .fs = &init_fs, \ 229 .files = &init_files, \ 230 .signal = &init_signals, \ 231 .sighand = &init_sighand, \ 232 .nsproxy = &init_nsproxy, \ 233 .pending = { \ 234 .list = LIST_HEAD_INIT(tsk.pending.list), \ 235 .signal = {{0}}}, \ 236 .blocked = {{0}}, \ 237 .alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \ 238 .journal_info = NULL, \ 239 .cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \ 240 .pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \ 241 .timer_slack_ns = 50000, /* 50 usec default slack */ \ 242 .pids = { \ 243 [PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \ 244 [PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \ 245 [PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \ 246 }, \ 247 .thread_group = LIST_HEAD_INIT(tsk.thread_group), \ 248 .thread_node = LIST_HEAD_INIT(init_signals.thread_head), \ 249 INIT_IDS \ 250 INIT_PERF_EVENTS(tsk) \ 251 INIT_TRACE_IRQFLAGS \ 252 INIT_LOCKDEP \ 253 INIT_FTRACE_GRAPH \ 254 INIT_TRACE_RECURSION \ 255 INIT_TASK_RCU_PREEMPT(tsk) \ 256 INIT_TASK_RCU_TASKS(tsk) \ 257 INIT_CPUSET_SEQ(tsk) \ 258 INIT_RT_MUTEXES(tsk) \ 259 INIT_PREV_CPUTIME(tsk) \ 260 INIT_VTIME(tsk) \ 261 INIT_NUMA_BALANCING(tsk) \ 262 INIT_KASAN(tsk) \ 263 } 264 265 266 #define INIT_CPU_TIMERS(cpu_timers) \ 267 { \ 268 LIST_HEAD_INIT(cpu_timers[0]), \ 269 LIST_HEAD_INIT(cpu_timers[1]), \ 270 LIST_HEAD_INIT(cpu_timers[2]), \ 271 } 272 273 /* Attach to the init_task data structure for proper alignment */ 274 #define __init_task_data __attribute__((__section__(".data..init_task"))) 275 276 277 #endif 278